The U.S. Department of Homeland Security and infrastructure protection
Infrastructure protection legislation and presidential directives
National infrastructure protection plan
National incident management systems (NIMS)
Assessments for infrastructure protection
Energy systems: fossil fuels, nuclear reactors, and hydroelectric power
Transportation sector : marine, road, rail, and aviation
Facilities and national icons
Environmental: agriculture and food, chemical, and water infrastructure
Electronic transmissions
Public safety
Weapons of mass destruction
Natural disasters
Geological hazards
Accidents.